These have been for sale in NZ for a long time.
The owners will be frustrated at how long they have been advertising and may even take less. NZ $18,000 is only UK 7,200 pounds and that is the highest the NZ dollar has been against the pound in 10 years.
here they are:
http://www.trademe.co.nz/Trade-Me-Motor ... 091533.htm (7,200 British pounds before you negotiate)
and this one
http://www.trademe.co.nz/Trade-Me-Motor ... 957748.htm
NOTE:
The bonnet on the last one is the original racing bulge bonnet, pinched from Triumphs racing division when they closed down the TR7/TR8 racing/rally section - Look in old Photo's for it, Calgar was in the UK at the time and gave them a crate for it(crate of beer).
This bonnet is why I added this post to the General wedge thread. Interesting that it has survived huh!